4.2 16 reason: because the height of the cuboid is reduced by 2 cm, it becomes a cube, indicating that the length and width of the cuboid are equal. After the height is reduced by 2 cm, the cutting face I * * * has four faces, namely, four faces with a width of 2 cm.
Solution: Let the length and width of a rectangle be x cm respectively.
48=2X × 4
48=8X
X =6
So v cube =6×6×6=2 16 cm?
5. 105 90 Reason: Because 3 and 5 are prime numbers, there is no common factor except 1. Find their common multiple, and only calculate the multiple of their product, so it is 105 and 90.
Ok, answer the question and ask me for help later, remember.